Rails - Feb 2006 - REST on Rails implementation / lib directory and Controllers

Has anyone tried to install/deploy the REST on Rails example from
XML.com? (http://www.xml.com/pub/a/2005/11/02/rest-on-rails.html)
 
Being fairly new to Rails, I don''t think I am putting the right pieces
in the right places and could use some advice.
 
The primary file associated with the install I have saved in the "lib"
directory but my Controller doesn''t seem able to find it.
 
Any advice?
 
Thanks,
 
-Mark
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